Machine for trimming box-corners.



J. T. LEGKENBY. MAGHINE FOR TRIMMING BOX commas.

APPLICATION FILED MAY 26, 1909 Patented Nov. 22, 1910.

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J. T. LEGKENBY.

MACHINE FOR TRIMMING BOX CORNERS.

APPLIGATION FILED MAYZS, 1909. 9'? 6 ,47 1 Patented Nov. 22, 1910.

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J. T. LEGKENBY. MACHINE FOR TRIMMING BOX CORNERS.

APPLICATION rum) mugs, 1909.

Patented Nov. 22, 1910.

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JAMES T. LECKENBY, OF HAMILTON, ONTARIO, CANADA.

MACHINE FOR TRIMMING BOX-CORNERS.

Specification of Letters Patent.

Patented Nov. 22, 1910.

Application filed May 25, 1909. Serial No. 498,197.

To all whom it may concern:

Be it known that I, JAMES T. LEGKENBY, a subject of the King of GreatBritain, residing at Hamilton, in the county of VVentworth and Provinceof Ontario, Canada,

have invented a certain new and useful Improvement in Machines forTrimming Box- Corners, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings.

This invention relates to machines for trimming the corners of boxes, aninstance of such machines being shown in my prior Patent No. 809,308,issued Jan. 9th, 1906.

It is the object of the present invention to improve upon structuralfeatures disclosed in my prior patent, and more particularly upon themounting and adjustment of the saws; upon the means for raising andlowering the upper frame work and the means for stopping and startingthe feed.

A further object of the invention is to provide a machine of thischaracter with an improved construction of belt tightener,

whereby the belt which is connected to a pulley mounted on the movableupper frame may be kept tight, and such tightness be preservednotwithstanding the vibrations of the machine.

0 With the above objects in view, the invention may be further definedas consisting of the combinations of elements embodied in the claimshereto annexed and illustrated in the drawings forming part hereof,wherein Figure 1 represents a side elevation of a machine constructed inaccordance with my invention; Fig. 2, is a central vertical section ofthe machine shown in the preceding figure; Fig. 3 is a side elevation ofthe machine shown in Fig. 1,the view being taken from the reverse sideof the machine; Fig. 4 rep resents a transverse sectional viewcorresponding approximately to the line H of Fig. 3; Fig. 5 representsan enlarged detail of the mechanism for raising and lowering the upperframe work; Fig. 6 represents a detail, partly in section, and partly inelevation, of the means for driving the chains which feed the boxesthrough the machine;

Fig. 7 represents a detail in elevation of the belt tightening device;Fig. 8 is a sectional detail corresponding to the line 88 of Fig. 7;Fig. 9 is an elevation of a saw-arbor mount; and Fig. 10 is an elevationof said mount, taken at right angles to Fig. 9.

The machine comprises generally four pairs of saws, each pair comprisinga horizontally arranged and a vertically arranged saw and so located asto operate simultaneously upon the four corner edges of a box, withmeans for feeding boxes past and in operative relation to said saws;means for adjusting the saws and the feeding means to various dimensionsof boxes; reversible power-driven mechanism for raising and lowering theupper frame, and means including a belt tightener for feeding the boxfeeding chains.

Describing the parts by reference characters, 1 represents the front and2 the rear corner posts of a rigid frame work by which the variousmechanisms are supported. These corner posts are connected by upper andlower transverse sills 3 and 4: as well as by lower side frame members5.

6 denotes a pair of upper longitudinal sills which are slidably mountedin the corner posts 1 and 2, preferably by a mortise-andtenonconnection, as indicated at 6 (Fig. 2). Two such sills are provided, onefor each side of the machine. These sills 6 carry the upper saws, theupper box-feeding mechanism, and the drum pulley by means of which theupper saw arbors are rotated. The lower portion of the frame supportsthe drive shaft, the shafts and connections by means of which the upperframe work is raised and lowered, the lower saws, lower box feedingmechanism and the various shafting.

The upper and lower saws and the mouths therefor are identical inconstruction and arrangement, the only difference being that the uppersaws are carried by the vertically adj ustable sills 6, while the lowersaw supporting members are fixed in position. As previously stated,there are four vertical saws, and four horizontal saws. The verticalsaws are designated by the numeral 7 and the horizontal saws by thenumeral 7*. A horizontal saw and a vertical saw are on a common mount,which may be a casting having bearings arranged at substantially rightangles to each other. The particular construction of the saw arbors,bearings and mount will be described with special reference to Figs. 2,3, 9 and 10. The saw mount comprises a base 8 with a pair of projectionsarranged at substantially right angles to each other and projectingdifferent distances from said base. One of these projections 9 forms asupport for one of the saw arbors. The projections are each providedwith a groove for the reception of a tongue projecting from the sawcarriage or support as shown at 10, said tongue being indicated indotted lines at 11, (Fig. 9). The carriage 10 is provided with cars 12and 13, each of said ears being provided with an elongated slot for thereception of a bolt 14t, said bolt being threaded into the projection 9and having a head engaging the outer surface of the appropriate ear. Theprojection 9 is provided with a bracket 15 having an adjusting screw 16extending therethrough and engaging the carriage 10. By slacking up thescrews let and operating the screw 16 it will be apparent that the sawcarriage may be adjusted longitudinally of the support and in a plane atright angles to the plane of the saw. For the purpose of varying theinclination of the saw arbor, a set screw 17 is provided, which extendsthrough the projection 9 into the groove therein and engages the tongueon the carriage 10. By slacking up the bolts 14: and adjusting the screw17, the carriage may be tilted, in the plane of the saw and at rightangles. to the arbor, to vary the inclination of the arbor with respectto the projection 9. The saw arbor is provided with a pulley .18, bymeans of which it may be driven. This arbor is mounted in bearings onits carriage, said bearings havin removable journal caps 19 and 20. Thebase 8 is provided with a projection supporting a channel sill.

similar carriage 21 for the other saw arbor, the said arbor beingarranged at substantially right angles to each other, as shown moreparticularly in Fig. 10. The carriage 21 is mounted in the same manneras carriage 10 and is adjusted in the same manner as the formercarriage, the longitudinal adjustment of the carriage being indicated bythe screw 22 and bracket 28.

The saw which is driven by pulley 21 is shown at 7 and, in the machine,four such saws are provided, the saws being arranged horizontally. Thesaw mounts 8 are reciprocably supported on the cross sills 24. Thesecross sills are preferably channel shaped, as Will appear from Figs. 2and 4, and the upper sill is connected at its opposite ends to thelongitudinal sills 6 while the saw mounts are conveniently applied tosaid sills by means of plates 25 which overlap the flanges of the sillsand are bolted to projections 26 carried by the mounts and embracing theouter edges of the sill flanges. Each mount 8 is provided with a lug 27projecting into the hollow interior of the An operating rod 28 isthreaded into said lug. There are two saw mounts carried by each crosssill and the rod 28 in each of said sills is threaded into lugsprojecting from both of the saw mounts on said sill. It will appear, byreference to Fig. 4, that the rods 28 may have their end portionsreversely threaded for such lugs whereby, on rotation of a rod, the sawmounts connected thereto may be made to simultaneously approach orrecede from each other.

For the purpose of simultaneously operating both rods 28, I provide thefollowing construction. 29 denotes a bevel gear which is mounted on thelower rod. This gear meshes with a similar gear 30 on a vertical shaft31. This shaft is provided with an elongated key-way 32 therein and isprovided at its upper portion with a bevel gear 33, said gear having ahub and being provided with a key slidably fitting said keyway. The hubextends through a suitable bracket 84 carried by the upper longitudinalsill 6 and is provided above said bracket with a collar by means ofwhich the hub and gear are supported. The gear 33 meshes with a gear 35on the upper rod 28. From the foregoing description, it will be apparentthat, by rotating the lower rod 28, the motion of said rod will betransmitted to the upper rod 28, whereby the saw mounts may besimultaneously adjusted to accommodate boxes of different widththercbetween. At the same time, the manner of mounting the gear on theshaft 31 permits the upper saw mounts to be raised with the sills 6without destroying the driving relation between the upper and lowerrods. The details of the construction by which this driving engagementis maintained are substantially the same as those employed for drivingthe upper feed chains, (see Fig. 6), and a further detailed descriptionof said construction is unnecessary.

The saws have associated therewith guides for the boxes and feedingchains cooperating with said guides and said saws for carrying the boxesin operative relation to the saws. Each .guide comprises a lateralmember 36 which is connected to a saw mount and extends longitudinallyof the machine. The members 36 engage the sides of the box. In additionto the member 36, each guide comprises a trough 37, there being twotroughs for the top side of the box and two troughs for the bottom sideof the box. The guide members 36 and 37 which are connected to the uppersaw mounts will be vertically and laterally adjustable, while the guidesconnected to the lower saw mounts are only laterally adjustable. Theupper troughs are inverted and each trough forms a guide for a feedchain 38. Each of these chains extends around three sprocket wheels 39,40 and 41 arranged in triangular form. The sprocket wheels 39 aremounted on a shaft 42 which is carried in bearings 43 depending from thesills 6, and the sprocket wheels 41 are mounted on a shaft 44 which issupported in like manner from the sills (i.

In order to drive the feed chains, I employ the following construction:-4:5 denotes a vertical shaft which is provided at its upper end with abevel gear 46 by means of which it is driven (see more particularlyFigs. 1, 3, 4 and 6). This shaft is located at one side of the machineand has its upper end projecting through the flanges of the channel sill6. The bevel gear 46 is provided with a key fitting in a longitudinalkey way 47 in shaft 45 and with a hub 48 projecting through the lowerflange of the sill 6. This hub is provided with a collar 49 by means ofwhich and a set screw 50 the gear 46 is rotatably supported from thesill 6. This gear meshes with a bevel gear 51 on a shaft 44, said shaftbeing supported by suitable hangers 52 and 58 carried by the sills 6.The shaft 45 is provided at its lower end with the bevel gear 46 whichis driven by a bevel gear .34 mounted on a shaft This shaft 535 ismounted in suitable supports 56 carried by the lower side frames and isdriven as follows:

57 denotes the main drive shaft of the machine. This shaft is providedwith a pulley 58.

59 denotes a shaft having a pulley 60, being connected to the formerpulley by the belt 61. This belt is normally too slack to cause thedriving of shaft 59 bv shaft 57.

To tighten the belt I provide a belt-tightening roller 62 mounted on alever, said lever having an arm 63 provided with an operating rod 64 andan arm 65 which is pivoted to any suitable portion of the frame. 66denotes another arm, projecting at an angle from arm and having anoperating handle 67. This operating handle is provided with a notchadapted to receive a locking projection 68 by means of which the roller62 may be locked out of engagement with the belt. Shaft 59 is providedwith a sprocket (39, by means of which and a chain 70 and a sprocket 71,the motion of shaft 59 is transmitted to a shaft 72. Shaft 72 isprovided with a pinion meshing with a gear 73 on the shaft From theconstruction illustrated and described, it will be apparent that, byoperating the rod ('34 and handle 67, the motion of the shaft 57 istransmitted through a. system of reduction gearing to the shaft 55. Themotion of this shaft in turn is'transmitted to the feed chains.

Adjacent to each corner post there is mounted a feed screw 74. Thesescrews are conveniently supported by the lower side frames 5 and arethreaded through projections 75 formed on the longitudinal sills 6. Eachscrew has at its lower end a bevel gear 76 meshing with a correspondingbevel gear 77 on a transverse shaft 78. Two such transverse shafts areshown, and each shaft has thereon a pair of the bevel gears 77, eachgear meshing with a bevel gear 76. The shaft 78 at the front of themachine is provided with a sprocket 79 by means of which and a chain 80,extending around a sprocket 81, it may be driven from the shaft Theshaft 82 is connected with a shaft 83 by means of a sprocket 84, chain85, and sprocket 86. The shaft 83 is driven from the main shaft 57 asfollows: This shaft 57 is provided with a pulley 87 and at the upper endof the machine are located a belt-tightening pulley 88 carried by anadjustable bracket 89, a pulley 90 on shaft 91 supported from thelongitudinal sill 6 and a pulley 92 also carried by one of the sills 6.A belt 87 extends around all these pulleys, as shown in Fig. 1.

93 denotes a lever, the lower end of which is conveniently pivoted onthe shaft 83. This lever is provided with a pair of arms extending inopposite directions from the central portion thereof and designated by94 and 95. One of these arms is extended and provided with a suitableoperating handle 96. The central portion 93 of the lever extends upalongside of one of the lower side frame members 5 and overhangs thesame. This lever is provided with a slot 97 for the reception of aheaded bolt 98 which extends through said slot and through an elongatedslot 99 in said side.frame member. These two slots and the boltextending therethrough retain the lever in its proper position withrelation to the side frame, allowing it to rotate on its pivot (whichmay be the shaft 83) and limit the throw of the lever so that either oneof the pulleys 100, 101 carried thereby may engage the belt 87 Thepulleys 100, 101 are mounted on stub shafts carried by the lever arms 94and respectively. Each of these stub shafts has thereon a sprocket shownat 102, 1.03 respcctively.

104 denotes a sprocket on the sh aft 83 and 105 a chain extending aroundsaid sprocket and the two sprockets 102 and 103.

From the construction described, it follows that, by operating the leverhandle 96 in one direction, the pulley 101 may be brought intoengagement with belt 87 and that this will cause the shaft 88 to bedriven in the appropriate direction, and that. by

operating the lever handle 96 in the opposite direction, the pulley 100will be brought into contact with said belt and the shaft 83 will berotated in the opposite direction from that given it by the pulley 101.Through the connections described, the shaft 78 will be driven in onedirection or the other according to the manner in which the lever handle90 is operated. The front and rear shafts 78 are connected by means ofsprockets 106 and a chain 106*, whereby both longitudinal side members 6may be elevated and lowered simultaneously.

Reference has been made to the belt-tight ening pulley 88. Thearrangement of pulleys 87, 88, 90 and 92 is such that the belt is i inits adjusted position.

maintained substantially tight during the excursions of the sills 6. Inorder to insure the tightness of the belt under all conditions,

l have provided the bracket 89, which is carried at the top of one ofthe posts 2, and means for adjusting said bracket vertically to vary thedistance between the pulleys 88 and 90; also means for locking thepulley 88 The construction by which this is accomplished will bedescribed with particular reference to Figs. 1,

v, 3, 7 and 8. From these figures, it will appear that the bracket 89 isslidably mounted upon the members of frame 107 opposite the.

bracket 89. This clamp is connected to the bracket 89 by means of a bolt112 extending through the hollow space inclosed by the bracket and thetwo side members of the frame 107.

113 denotes a threaded lug which is carried by the bracket 89,preferably projecting from the end of a bolt 114C extending through saidbracket into the space included between the side members of frame 107.

115 denotes a screw having a head 110 bearing on top of the frame 107and threaded through the lug 113, the lower end of said screw resting ontop of the post 2. It will be apparent that, by rotating the screw 115,the bracket 89 will be raised or lowered, according to the direction ofrotation, while the construction of the clamp 111 and the bracketpermits the rise and fall of the bracket and clamp on the frame. Bytightening the bolt 112, the position of the bracket will not be alteredby the jarring of the machine.

The shaft 91 has mounted thereon the drum pulley 117, by means of whichthe upper saw arbors are driven. The pulleys for driving the verticalarbors are tapered,

as shown more particularly in Figs. 2 and 10. These pulleys are drivenby means of belts 118. The pulleys for driving the horizontal saw arborsare driven from the same drum pulley 117 by means of belts 119. The drumpulley for the lower saws is shown at 120 and is preferably mounted onthe main shaft 57. The lower vertical saw arbors are shown as drivenfrom said pulley belts 121 and the lower horizontal arbors are drivenfrom the same pulley by belts 122.

Having thus described my invention, what I claim is 1. In a machine ofthe character described, the combination of box trimming means, meansfor feeding boxes in operative relation thereto, a shaft for drivingsaid means,

a pulley on said shaft, a drive shaft having a pulley thereon, a loosebelt connecting said pulleys, and means for tightening said belt, saidmeans comprising a lever having a pair of operating arms projecting inopposite directions therefrom and said lever being pivoted adjacent toone of said arms, a roller carried by said lever at a point remote fromthe pivot thereof, and adapted to engage said loose belt and a rodconnected to one of said operating arms to operate the belt tighteningmeans.

2. In a machine of the character set forth, the combination of boxtrimming means, means for feeding boxes in operative relation thereto, ashaft for driving said means, a drive shaft having a pulley thereon, anintermediate shaft also having a pulley thereon, connections between theintermediate shaft and the first mentioned shaft, a belt extendingaround said pulleys, and means for tightening said belt, said meanscomprising a lever having a roller thereon, a rod connected with saidlever for rocking the same, a second rod connected with said lever onthe opposite side of its pivot from the first-mentioned rod, whereby thebelt tightening device may be operated by the rod, and means adapted toengage the latter rod to retain the roller out of contact with the belt.

3. In a machine of the character set forth, the combination of an upperpair of saw mounts and a lower pair of saw mounts, an arbor for each ofsaid saw mounts, a pulley on each arbor, a frame supporting the upperpair of saw mounts, a frame supporting the lower pair of saw mounts,means for adjusting the saws on the upper frame toward and from eachother, means for adjusting the saws on the lower frame toward and fromeach other, a drum pulley mounted on the upper frame, a drum pulleymounted on the lower frame, and a pair of belts 011 each of said drumpulleys, each belt on said pulleys extended around the pulley on thecorresponding saw arbor.

4. In a machine of the character set forth, the combination of a pair ofsaw mounts, means for adjusting the mounts toward and from each other, apair of rotary saws carried by each mount, a pulley for rotating eachsaw, a drum pulley, a pair of belts extending around said drum pulleyand each extending around a saw arbor pulley, and means for driving thedrum pulley.

5. In a machine of the character described, the combination of an upperand a lower pair of saw mounts, a vertically adjustable frame upon whichone pair of saw mounts are carried, a threaded rod supported by the saidframe and engaging a threaded portion of one of the upper mounts, athreaded rod mounted adjacent the lower mounts and engaging a threadedportion of one of the lower mounts, connections for driving one of thesaid rods from the other, means whereby such driving connection may bepreserved when the upper frame is adjusted, a shaft, and connectionsbetween said shaft and one of said rods.

6. In a machine of the character described, the combination of an upperand a lower pair of saw mounts, a rod extending through the upper sawmounts and having reversely threaded portions engaging both of saidmounts, a rod extending through the lower saw mounts and havingreversely threaded portions engaging both of said mounts, means fordriving one of said rods, and con nections between said rods wherebyboth will be driven simultaneously.

7. In a machine of the character set forth, the combination of an upperand a lower pair of saw mounts, a rod threaded into one of the uppermounts, a second rod threaded into one of the lower mounts, a verticallyadjustable frame for one pair of mounts, a drive shaft, connectionsbetween the same and one of the rods for driving the latter, a bevelgear on said rod, a shaft having a pair of bevel gears thereon, one ofsaid gears meshing with the bevel gear on the rod and the other bevelgear being reciprocably connected with the vertical shaft, a bevel gearon the other rod, and means carried by the adjustable frame forretaining the latter gear and the sliding gear in mesh with each other.

8. I11 a machine of the character set forth, the combination of avertically adjustable frame, saws carried thereby, rods threaded intosaid frame, a shaft having a driving connection with one of said rods, acontinuously driven shaft having a pulley and belt for driving the saws,a shaft having a driving connection with the first mentioned shaft andprovided with a sprocket, a pivoted lever, a pair of shafts carriedthereby, a roller on each shaft, a sprocket on each of the lattershafts, a chain extending around all of said sprockets, means wherebysaid lever may be rocked to bring either of said rollers into engagementwith said belt, and means for driving all of said rods from the firstmentioned rod.

9. In a machine of the character set forth, the combination of anadjustable frame, a rotary saw carried thereby, a shaft, a belt driventhereby to rotate said saw, and means for adjusting said frame, saidmeans comprising a frame-operating shaft, a lever having a pair ofshafts thereon, a roller on each shaft, said rollers being arranged onopposite sides of said belt, a driving connection common to both of thelatter shafts and to the frame operating shafts, and means whereby saidlever may be rocked to bring one or the other of the rollers thereoninto engagement with said belt.

10. In a machine of the character set forth, the combination of anadjustable frame, a saw carried thereby, a shaft, a belt driven by saidshaft for operating said saw, a shaft for elevating and depressing saidframe, and means for driving said shaft from said belt, said meanscomprising a pair of rollers, said roller being arranged on oppositesides of the belt, a shaft for each of said rollers adapted to be driventhereby, a connection between both of the latter shafts and theframe-operating shaft, and means for bringing one or the other of saidrollers into engagement with said belt.

11. The combination of a saw mount, said mount having a pair ofprojections and said projections being arranged at substantially rightangles to each other, a movable saw support mounted on each of saidprojections, a saw arbor j ournaled in each support, means for adjustingsaid carriage longitudinally of their respective projections, and meansfor adjusting said supports toward and from their respective proections.

12. The combination of a saw mount and a pair of saw supports thereon,each of said supports having a saw arbor, said arbors being arranged atsubstantially right angles to each other, means for adjusting each ofsaid supports longitudinally along said mount, and means for varying theangle between said supports and said mount.

13. The combination of a saw mount and a pair of saw supports thereon,each of said supports having a saw arbor, said arbors being arranged atdifferent distances from the base of the mount and having their planesintersecting, means for adjusting each of said supports longitudinallyalong said mount, and means for varying the angle between said supportsand said mount.

In testimony whereof, I hereunto affix my signature in the presence oftwo witnesses.

JAS. T. LEGKENBY.

Ht-nesses F. R. VVALTERs, M. J. JEFFREY.

